Part II: Low Energy Galactic Neutrinos

TL;DR

This paper explores low energy galactic neutrinos under two gravity models, showing their potential as dark matter candidates and as probes of gravity's fundamental nature, with implications for dark matter and matter-antimatter asymmetry.

Contribution

It introduces a novel analysis of galactic neutrinos under quantum gravity and spacetime curvature models, highlighting their different behaviors and potential as dark matter.

Findings

Quantum gravity predicts a neutrino bound structure with negligible mass.

Spacetime curvature allows neutrinos to mimic dark matter in galaxy rotation curves.

Neutrino-antineutrino equilibrium may explain matter-antimatter asymmetry.

Abstract

We study low energy galactic neutrinos in the Milky Way under two fundamentally different descriptions of gravity, showing that neutrinos provide a sensitive probe of gravity underlying nature. If gravity is a quantum interaction, its long range character leads to the formation of an atom like bound neutrino structure. We compute its mass distribution and find that, within a radius 292 kpc, the total mass is only ten to the minus 29 of the galaxy dark matter, ruling it out as a dark matter candidate. Nevertheless, experimental confirmation of this structure would constitute direct evidence for gravity as a quantum force mediated by gravitons. If gravity instead arises from spacetime curvature, neutrinos interact only via the short range weak force and are therefore effectively collisionless. In this regime, neutrinos behave as free classical particles orbiting the galaxy and experience no Fermi pressure. We show that such a population can be sufficiently compact to reproduce the Milky Way rotation curve, making neutrinos viable dark matter candidates. The extremely small neutrino antineutrino annihilation cross section further implies near equilibrium between neutrinos and antineutrinos, potentially addressing the matter antimatter asymmetry.